$ git clone -n https://src.fedoraproject.org/rpms/libpanel.git /var/lib/mock/f39-build-1575772-37939/root/chroot_tmpdir/scmroot/libpanel
Cloning into '/var/lib/mock/f39-build-1575772-37939/root/chroot_tmpdir/scmroot/libpanel'...
$ git fetch origin 1ffd4ada4bd431743a33096b05b81184307d8184:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libpanel
 * [new ref]         1ffd4ada4bd431743a33096b05b81184307d8184 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1ffd4ad Update to 1.4.0